Fig. 1

Number of transitions between P. poissonii, hybrids and P. anisodora within bouts of three pollinator groups. On the top the currently visited species is indicated, and on the x-axis which species the pollinator had visited immediately before. Pollinators were: Bees (Anthophora sp.), Bumblebees and Butterflies (Aporia bieti). Most visits of butterflies were restricted to P. poissonii with some occasionally visiting hybrids, while bees and bumblebees mostly visited P. anisodora, but were less selective, with several visiting hybrid and P. poissonii flowers